I had a lot of fun playing this game! I really enjoyed the low-poly art and how cohesive the game's atmosphere felt. That said, I want to echo another commenter's sentiment that it's a shame you incorporated AI art, as it detracts from the hard work and authenticity of your team's efforts. Plus, using promo images with a completely different art style misrepresents your game and feels off.
I did encounter a bug during my playthrough where my ship started rapidly ascending and spinning away into the air, allowing me to fly above the map. While I got a good laugh out of it, I'm guessing that wasn't supposed to happen and might disrupt the gaming experience for others. On the bright side, the boat steering mechanic is really fun. It's a bit tricky to control, but that adds to the whimsical, playful vibe and mimics the rocking of the sea perfectly.
Overall, great job! Just a suggestion: it would be awesome if you stuck with real artists for the illustrations. It keeps everything genuine and adds to the game's charm. Keep up the good work!